Antonio Speller , a committed filmmaker , lose the desire to carry on with art films after finding his wife in bed with one of his actresses . The sentimental crisis it also leads to an artistic change and in fact since that time Antonio decides to make film "trash " only. In the same period he gets back closer to Paola , an ex - lover and a cult film magazine manageress . In his life come suddenly two young girls : Tosca , a screenwriter professionally determined and Mara , a young girl ready to do anything to get a part in a movie

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A young girl witnesses her friend's murder. The killer realizes that he has been seen. A long hunt begins that will last all night, ending in an out of service hotel where the truth of what happened will be revealed.